King Zandor and Queen Tara were constantly defending their planet, Amzot (Quasar in later versions), and all its tiers of society, from the attacks of alien invaders. For this formidable task, the King and Queen employed the help of five extraordinary "Herculoids," a group of odd creatures that showcased some of the most inventive animation ever found on a Hanna-Barbera series.
Zandor and Tara may have employed the help of the Herculoids, but they could hold their own in a fight if the need arose. Zandor, who wore green trunks and gold bracelets, was as skillful with energy rocks as Tundro was - though lacking a cannon on his head, he needed to use a slingshot. The King's shield not only acted as a boomerang, but worked as a parachute as well. Tara was no slouch of a marksperson herself, and even their son Dorno was adept at slinging those exploding rocks.